Unemployment and $600 weekly CARES benefits -Taxes

I live in MN. I just got a MN Unemployment Insurance Information Handbook. “What you need to know about Unemployment” It says that Benefits are subject to federal income taxes and most state income taxes, according to the Department of Labor. The same goes for the $600. You should be able to elect to have taxes withheld.

I change my tax level to the offered %15 percent. Bummer